Drinking cup



FIG. 1 is a perspective view of a drinking cup in its closed position showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof in its open position.

The broken lines in the drawings depict portions of the drinking cup that form no part of the claimed design. 

CLAIM The ornamental design for a drinking cup, as shown and described. 